1839 A. Ure 575 If we put in the whole ingredients together, as is done with potash glass, the sand and lime soon fall to the bottom.
1922 T. M. Lowry xli. 801 Smalt is a potash glass coloured blue with cobalt.
2004 (Nexis) 1 Jan. 58 As a coloring oxide in lead potash glasses, manganese produces an amethyst color, while in soda glass a reddish-violet is produced.